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Evaluation Method for Self-Weight Collapse Deformation of Tunnel Foundations in Thick Loess
Collapse deformation of loess tunnel foundation may appear when the overlying loess stratum is soaked, and the resulting additional effect could cause damage to the lining structure. In this paper, a method for determining the collapsible compressive stress of a loess tunnel foundation is presented, which considers the dead-weight of lining structure, surrounding rock pressure, and collapsibility deformation under overburden pressure. In addition, a calculation method of self-weight collapse coefficient under collapsible compressive stress is established, which considers the structural index, structural compressive yield stress, and physical parameters of loess. Furthermore, the plastic zone of the lining under the action of differential settlements during collapse deformation is simulated and analyzed, and the classification standard for the grade of collapse deformation of the tunnel foundation is proposed with reference to the control standard of a railway subgrade.
Evaluation Method for Self-Weight Collapse Deformation of Tunnel Foundations in Thick Loess
Collapse deformation of loess tunnel foundation may appear when the overlying loess stratum is soaked, and the resulting additional effect could cause damage to the lining structure. In this paper, a method for determining the collapsible compressive stress of a loess tunnel foundation is presented, which considers the dead-weight of lining structure, surrounding rock pressure, and collapsibility deformation under overburden pressure. In addition, a calculation method of self-weight collapse coefficient under collapsible compressive stress is established, which considers the structural index, structural compressive yield stress, and physical parameters of loess. Furthermore, the plastic zone of the lining under the action of differential settlements during collapse deformation is simulated and analyzed, and the classification standard for the grade of collapse deformation of the tunnel foundation is proposed with reference to the control standard of a railway subgrade.
Evaluation Method for Self-Weight Collapse Deformation of Tunnel Foundations in Thick Loess
Shao, Shengjun (author) / Wang, Zhi (author) / Shao, Shuai (author)
2022
Article (Journal)
Electronic Resource
English
BKL:
56.20
Ingenieurgeologie, Bodenmechanik
/
56.20$jIngenieurgeologie$jBodenmechanik
Evaluation Method for Self-Weight Collapse Deformation of Tunnel Foundations in Thick Loess
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